I believe it's called a "Phoenix Plug" or "Phoenix Jack".
You should be able to find it locally at an electronics parts store, or online on Ebay or Amazon.
They come with different numbers of terminals, so make sure you order the right one.
You should be able to find it locally at an electronics parts store, or online on Ebay or Amazon.
They come with different numbers of terminals, so make sure you order the right one.